Back to results
US 7,300,474 B2Granted
Aqueous liquid formulations of pyrazoline brighteners
AssigneeClariant Produkte (Deutschland) GmbH
InventorsGerhard Zirkenbach, Alexander Lerch
Life of this patent
Estimating the term…
Abstract
The claimed liquid formulations contain an organic acid and a branched mono- or di-alcohol. The addition of the alcohol improves the storage stability of the liquid formulations.
Claims13
An aqueous liquid formulation comprising an organic acid, a branched mono- or di-alcohol and a pyrazoline brightener of the formula
- wherein
- X is O, SO2, SO2NZ or a direct bond,
- Y is an alkylene chain,
- Z is H or alkyl,
- R1 and R2 are singly an alkyl, cycloalkyl or aralkyl radical or together the remaining members of an N-heterocycle,
- Z1 is H or alkyl,
- Z2 is H, alkyl or aryl, and
- A(−) is an anion of an organic acid.
5 more elements
The aqueous liquid formulation comprising an organic acid, a branched mono- or di-alcohol, and a pyrazoline brightener compound of the formula
- wherein
- D is —CH2CH2—, —CH2CH2CH2—, —CH2CH2—OCH2CH2,
- R1′ and R2′ are independently C1-C2-alkyl, A(−) is an anion of an organic acid, and
- T1, T2, T3 are independently H, CH3 or Cl.
1 more element
Dependencies are inferred from the claim text.